基于IDA分析的新型消能摇摆结构抗震性能

Anti-seismic performance of new energy dissipation swing structure system based on IDA analysis

针对重大灾害过程中建筑结构的破坏特点,采用增设摇摆刚架的设计方法构建新型消能摇摆结构体系,并利用IDA分析方法对其抗震性能进行系统研究.以已建成的某6层框架结构为研究对象,建立新型消能摇摆结构体系的计算模型.选取ATC-63建议的20条远场地震波作为地震动输入,利用OpenSees软件对该结构体系进行增量动力分析,获得结构体系在不同地震动激励下的动力响应,并结合现行建筑抗震设计规范探讨新型消能摇摆结构体系的抗震性能.结果表明:新型消能摇摆结构体系的变形模式与耗能机制更为合理,其抗震性能优于传统结构体系.

Aimed at the destruction feature of the building structure during serious seismic disaster,new energy dissipation swing structure system is constructed with a design method,where a swing rigid frame is added.The IDA analysis method is utilized to investigate systematically its seismic performance.Taking the frame structure in a completed six-storey building as the research target,the computation model for the new energy dissipation swing structure system is established.20 distant seismic waves suggested by ACT-63 are taken as the ground motion input to achieve its dynamic response to different seismic exitation with IDA（increment dynamic analysis）in the software OpenSees.Furthermore,in accordance with the current code for seismic design of building,its anti-seismic property is explored.The result shows that the deformation mode and energy dissipation mechanism of the new energy dissipation swing structure are more reasonable and its anti-seismic performance is superior to that of traditional structural system.